Door structure



May 31 1932. c. H. HOFFSTETTER DOOR STRUCTURE Filed May 21, 1930 BY 5%5m Patented 'May 31, 1932 UNiT n STATES PATENT orrics CARL n. norrsrnrrna, or :enrn, rnNNsYLvANm, ASSIGNOR TO ODIN srovn MANU- rec'rname COMPANY, or ERIE, PENNSYLVANIA, a CORPORATION or PENNSYL- VANIA DOOR STRUCTURE Application filed May 21, 1930. Serial No. 454,483.

The present invention is particularly advantageous for use with stoves and is shown as so exemplified. Many of such doors not only serve as a means for closing an oven,

but also as a platform, or shelf in front of the oven when the door is open. It is very desirable, therefore, to have the door of light construction so that it may be readily handled and of such rigidity that it will hold its shape is so as to properly seat on the door frame of the oven and also properly support material when operating as a shelf. With such doors also cheapness is of great consideration and where the door is enameled as is now common 15 rigidity is also of importance in preserving the enamel. Features and details of the invention will appear from the specification and claims.

A preferred embodiment of the invention 20'is illustrated in the accompanying drawings as follows Fig. 1 shows a perspective view of a detached inner plate or lining of the door, the view being from the outer face of such plate.

Fig. 2 aperspective rear view of a detached outer plate of the door.

Fig. 3 asection on the line 3-3 in Fig. 4:.

Fig. 4 a perspective View of an ovenwith the door in place.

1 marks the door frame and 2 the door opening. These may be of common construe tion and 3 marks the door.

The front plate l of the door has its outer surface convex conforming somewhat to a pyramidal shape. The edges of this plate have the inturned flange 5. I

An inner plate 6 has outturned flanges 7 which telescope with the flanges 5, the flanges being outside of the flanges 7. The plate 6 has ribs 8 forming a square, or rectangle around the plate and ribs 9 joining the corners of this rectangle. These ribs are formed by indenting the plate.

This shaping of plates, particularly the outer plate, away from a plane surface stiffens this plate particularly in connection with the surrounding ribs and shaping the inner plate away from the plane surface accomplishes the same result particularly as 60 ribbed in connection with the flangesb The door so placed together makes a very rigid, but very light door, thus maintaining its seating surface so as to make a desirable closure and operating securely as a shelf. By arranging the flange of the outer plate over the inner plate the finish of the outer plate may be carried on to this flange, thus giving a very pleasing effect as to finish. The actual contact, or seating of the door is on the rear plate and this to some extent breaksthe 5. shock on the front plate as the door is slammed shut and thus prevents the cracking or injury to the enamel of the front plate. As a convenient means of securing the two plates together the inner plate has slots 10 in theflange at the lower edge and the outer plate has inturned lips 11 which may be hooked into the slots 10 and thenthe two parts swung together to their assembled position. After they are brought to this position they are secured together by placing'the handle 12'at the upper part of the outer plate and v passing a screw 13 through the inner and outer platesinto the handle. Thus the screw not only secures the plates together, but the 7 handle in place.

A pintle rod 14 extends through openings 15 in the flange 5 at the sides. This rod eX- tends into sockets (not shown) in the door frame and thus forms the hinge for. the door. Plates 16 are spot welded to the flange 7 at the lower side edges of the door and these. plates have the forwardly projecting arms 17 which extend through slots 18 in the plate 6 adjacent to the flange. A hook'20 on the end of the arm engages ashoulder 21 on the door frame so as to stop the outward swinging of the door in a horizontal position. A spring 22 has one end hooked into an opening 23 in the arm 17 and the opposite end of the spring is hooked .into a perforation24 in a lug 25 extending from the door frame. These springs are tensioned as the door is swung open and tend to balance the door and assist in closing the door and holding the same in closed position. It 'will be seen, therefore, that the plates 16 bracethe door in connection with the arms so as to properly support the door when operating as a shelf and at the same time that the structure as a I whole can be made very cheaply and very light affording an insulating air space between the parts, and having, with a very small amount of metal, great rigidity.

What I claim as new is 1. In a door structure, the combination of a sheet metal front plate; a sheet metal rear plate, said rear plate forming the seating face of the door; a flange connection between the edges of the plates, the connection being hooked together at one edge through the flange connection; means securing the plates together opposite the interlocked edge; and a handle secured by said means.

2. In a door structure, the combination of a sheet metal front plate; a sheet metal rear plate, said rear plate forming the seating face of the door; and opposing telescoping flanges at the edges of the plates, the flange of the outer plate being outside the flange of the inner plate and the inner edge of the flange of the front plate terminating short of the seating face of the rear plate.

3. In a door structure, the combination of an integral sheet metal front plate; a sheet metal rear plate, said rear plate forming the seating face of the door; opposing telescoping flanges at the edges of the plates, the flange of the outer plate being outside the flange of the inner plate, said plates being bent out of a plane to stiffen them; and means securing the rear plate directly to the front plate, said plates sustaining the entire warping strains of the door.

4. In a door, the combination of a front plate of convex contour having flanges around its edge; a rear plate having flanges around its edges, the bottom flange having slots, said rear plate forming the seating face of the door; lips on the flange of the front plate extending into said slots, said flanges telescoping with the flange of the front plate at the outside; indented ribs on the rear plate stiffening the same; a handle on the front plate; and screws extending through said plates into said handle securing the plates together and the handle in place.

5. In a door structure, the combination of a sheet metal front plate; a sheet metal rear plate, said rear plate forming the seating face of the door; and telescoping flanges on the edges of the plates, the flange on the front plate being outside the flange on the rear plate, the front plate having a convex contour and the inner edge of its flange terminating short of the seating face of the rear plate.

6. In a door structure, the combination of an integral sheet metal front plate; a sheet metal rear plate, the rear plate forming the seating face of the door; telescoping flanges between the edges of the plates; and means securing the rear plate directly to the front plate, said rear plate being ribbed by indenture extending into the space between the plates, said plates sustaining the entire warpin strains of the door.

I. In a door structure, the combination of an integral sheet metal front plate; a sheet metal rear plate, the rear plate forming the seatingface of the door; telescoping flanges between the edges of the plates; and means securing the rear plate directly to the front plate, said front plate having a convex contour and the rear plate being ribbed by indenture extending into the space between the plates, said plates sustaining the entire warping strains of the door.

In testimony whereof I have hereunto set my hand.

CARL H. HOFFSTETTER. 

